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Offerings // GT Biopharma, Inc.

GTBP offering history

Every offering-related filing in GT Biopharma, Inc.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 883 filings back to May 12, 1995.

Last executed offering
Sep 21, 2026
8-K — priced deal (shares or notes)
Last registration (announced)
Oct 9, 2026
S-1 — capacity, not a sale
Executed, last 12 months
2
424B pricings + 8-K 3.02 sales
Registered, last 12 months
3
S-1/S-3/F-series registrations
DateFilingWhat it means
Oct 20, 2026424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Oct 20, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Oct 9, 2026S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Sep 21, 20268-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Sep 15, 20268-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
May 13, 2026424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
May 13, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Apr 30, 2026S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Jan 30, 2026424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Jan 30, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jan 21, 2026S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Jan 8, 2026424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Dec 2, 2025424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Dec 2, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Oct 24, 2025S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Jul 3, 2025424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Jul 2, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jun 27, 2025S-1/A →REGISTEREDS-1/A registration — capacity to sell shares, not a sale yet
Jun 11, 2025S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
May 27, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
May 13, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Apr 4, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Mar 14, 2025424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Mar 13, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Mar 6, 2025S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Feb 26, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Feb 24, 2025RW →WITHDRAWNRegistration withdrawn
Feb 7, 2025S-1/A →REGISTEREDS-1/A registration — capacity to sell shares, not a sale yet
Jan 27, 2025S-1/A →REGISTEREDS-1/A registration — capacity to sell shares, not a sale yet
Dec 23, 2024S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Jul 2, 2024424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Jun 28, 2024EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jun 27, 2024S-1/A →REGISTEREDS-1/A registration — capacity to sell shares, not a sale yet
Jun 20, 2024S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
May 23, 20248-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
May 23, 2024424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jan 4, 2023424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Oct 20, 2022EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Oct 13, 2022S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Apr 27, 2021EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
GTBP offering-related filings from SEC EDGAR, newest first (capped at 40). Each links to the original document.

Two honest limits. (1) A 424B takedown can price shares or notes — EDGAR’s metadata doesn’t say which, so open the document: large investment-grade filers use these mostly for bond deals (no dilution), small-caps mostly for shares. (2) At-the-market (ATM) programs sell shares gradually and individual sales are not separately filed — the visible footprint is the enabling shelf and its 424B5; actual ATM share counts surface later in the 10-Q/10-K share count. Educational information from public filings, not investment advice.

Is a shelf active now? →Do they need money? →Red flags →Full GTBP workspace →
GTBP offering FAQ

When did GTBP last execute an offering?

Per SEC filings, GT Biopharma, Inc.'s most recent priced offering document is a 8-K filed 2026-09-21. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did GTBP last announce or register an offering?

The most recent registration is a S-1 filed 2026-10-09. A registration is capacity to sell shares — not a sale.

Does an offering always mean dilution?

Registered direct offerings and shelf takedowns issue new shares and dilute existing holders. Resale registrations (424B3/B7) let existing holders sell and do not create new shares. Secondary sales by insiders also do not dilute. Each row here is labeled with what it is.

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